// -----------------------------------------------------------------------------
// This file contains all application-wide Sass functions.
// -----------------------------------------------------------------------------

/// Native `url(..)` function wrapper
/// @param {String} $base - base URL for the asset
/// @param {String} $type - asset type folder (e.g. `fonts/`)
/// @param {String} $path - asset path
/// @return {Url}
@function asset($base, $type, $path) {
  @return url($base + $type + $path);
}

/// Returns URL to an image based on its path
/// @param {String} $path - image path
/// @param {String} $base [$base-url] - base URL
/// @return {Url}
/// @require $base-url
@function image($path, $base: $base-url) {
  @return asset($base, 'images/', $path);
}

/// Returns URL to a font based on its path
/// @param {String} $path - font path
/// @param {String} $base [$base-url] - base URL
/// @return {Url}
/// @require $base-url
@function font($path, $base: $base-url) {
  @return asset($base, 'fonts/', $path);
}

/// Slightly lighten a color
/// @access public
/// @param {Color} $color - color to tint
/// @param {Number} $percentage - percentage of `$color` in returned color
/// @return {Color}
@function tint($color, $percentage) {
  @return mix(white, $color, $percentage);
}

/// Slightly darken a color
/// @access public
/// @param {Color} $color - color to shade
/// @param {Number} $percentage - percentage of `$color` in returned color
/// @return {Color}
@function shade($color, $percentage) {
  @return mix(black, $color, $percentage);
}

@function rtl-invert($value) {
  @if $dir == rtl {
    @return -$value;
  } @else {
    @return $value;
  }
}